- Today's Word
Vapid
VAP-id
Definition
(adjective) Offering nothing that is stimulating or challenging; dull.
Example
The dialogue in the film was so vapid it became unintentionally comedic.
Fun Fact
Vapid originally described drinks that had lost their fizz—flat wine, stale beer. Over time, it broadened to describe anything mentally or emotionally dull. Today it’s used by critics to describe uninspired writing, lifeless performances, or empty political rhetoric. In short, it’s the word for anything that should feel alive—but doesn’t.
(adjective) Capable of producing the desired result; successful in achieving the intended outcome.
The new treatment proved remarkably efficacious in clinical trials, reducing symptoms in over ninety percent of patients within the first two weeks.
Efficacious derives from the Latin efficax, meaning “powerful” or “effectual,” rooted in efficere — “to bring about” or “to accomplish” — built from ex- (“out”) and facere (“to make” or “to do”). The same root gives us effect, efficient, and efficacy — a family of words all built around the idea of something being done and producing a result. It entered English in the 16th century, used predominantly in medical and philosophical contexts to describe remedies or arguments that actually worked.